IGA score is given based on the investigator's assessment of the participant's plaque psoriasis at a given time point. Overall lesions are graded for induration, erythema, and scaling. The participant's plaque psoriasis is assessed as: cleared (0), minimal (1), mild (2), moderate (3), or severe (4).

PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In this system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed and scored separately for erythema, induration, and scaling, which are each rated on a scale of 0 (none) to 4 (severe) and extent of involvement on a scale of 0 (indicates no involvement) to 6 (90% to 100% involvement). The PASI produces a numeric score that can range from 0 to 72. A higher score indicates more severe disease. A PASI 90 response represents participants achieving at least a 90 percent improvement from baseline in the PASI score.

IGA assesses participant's plaque psoriasis. Lesions were graded for induration, erythema and scaling, each using 5 point scale. Induration: 0 =no evidence of plaque elevation, 1=minimal plaque elevation,= 0.25 millimeters (mm); 2=mild plaque elevation,= 0.5 mm; 3=moderate plaque elevation,= 0.75 mm; 4=severe plaque elevation, greater than (\>) 1 mm; Erythema: 0=no evidence of erythema, hyperpigmentation may be present, 1=faint erythema, 2=light red coloration, 3=moderate red coloration, 4=bright red coloration; Scaling: 0=no evidence of scaling, 1=minimal; 2=mild; fine scale dominates, 3=moderate; coarse scale predominates, 4=severe; thick, scale predominates. Final IGA score of psoriasis was based upon average of induration, erythema and scaling scores assessed on 5 point scale: cleared (0), minimal (1), mild (2), moderate (3), or severe (4). Higher score=more severe disease. Baseline=closest measurement taken prior to or at the time of first study drug administration date.

Percentage of participants who achieved PASI-90 score (\>=90% improvement from baseline in PASI) at Week 16 was reported. The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas was assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0 = none, 1 = slight, 2 = moderate, 3 = severe and 4 = very severe) and extent of involvement from 0 (indicated no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date.

Percentage of participants with GPP who experienced treatment success at Week 16 was reported. Treatment success for GPP was defined as at least "minimally improved" rating in Clinical Global Impression (CGI) scale for GPP based on Japanese Dermatological Association (JDA) total score. JDA severity index includes skin symptoms (area of erythema with pustules, total area of erythema, and area of edema; each scored 0-3) and systemic/laboratory findings (fever, white blood cell count, C-reactive protein, and serum albumin; each scored 0-2). JDA total score was sum of 2 assessments ranging from 0 (best) to 17 (worst). CGI ratings were defined as: 1=Very much improved (greater than or equal to \[\>=\]3-point reduction in JDA total score), 2=Much improved (1-2-point reduction), 3=Minimally improved (no change in JDA total score, but \>=20 percent (%) reduction in area of erythema with pustules or meaningful improvement in \>=1 other parameter), 4=No change, 5=Worsened. Higher score = worsening.

Percentage of participants with EP who experienced treatment success at Week 16 was reported. Treatment success for EP was defined as at least "minimally improved" rating in CGI scale for EP. The CGI scale is a clinician-rated 5-point scale with the following categories: 1 = Very much improved, 2 = Much improved, 3 = Minimally improved, 4 = No change, 5 = Worsened. Higher score indicated worsening.

IGA assesses participant's plaque psoriasis. Lesions were graded for induration, erythema, scaling, each using 5 point scale. Induration:0=no evidence of plaque elevation, 1=minimal plaque elevation,=0.25 millimeters(mm); 2=mild plaque elevation,=0.5 mm; 3=moderate plaque elevation,=0.75 mm; 4=severe plaque elevation,\>1 mm; Erythema: 0=no evidence of erythema, hyperpigmentation may be present, 1=faint erythema, 2=light red coloration, 3=moderate red coloration, 4=bright red coloration; Scaling: 0=no evidence of scaling, 1=minimal; occasional fine scale over less than 5% of lesion, 2=mild; fine scale dominates, 3=moderate; coarse scale predominates, 4=severe; thick, scale predominates. Final IGA score was based upon average of induration, erythema and scaling scores assessed on 5 point scale: cleared (0), minimal (1), mild (2), moderate (3), or severe(4). Higher score=more severe disease. Baseline=closest measurement taken prior to or at time of first study drug administration date.

Percentage of participants who achieved PASI-90 score (\>=90% improvement from baseline in PASI) at Week 16 was reported. The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas was assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0 = none, 1 = slight, 2 = moderate, 3 = severe and 4 = very severe) and extent of involvement from 0 (indicated no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date.

Clinical response is defined as decrease from baseline in the modified Mayo score by greater than or equal to (\>=) 30 percent (%) and \>=2 points, with either a \>=1-point decrease from baseline in the rectal bleeding subscore or a rectal bleeding subscore of 0 or 1.

Percentage of participants who achieved PASI-75 score (greater than or equal to \[\>=\] 75% improvement from baseline in PASI) at Week 16 were reported. The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0=none, 1 = slight, 2 = moderate, 3 = severe and 4 = very severe) and extent of involvement from 0 (indicated no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date.

Percentage of participants who achieved \>=75% improvement from baseline in PASI score at LTE Week 36 was reported. The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0=none, 1=slight, 2=moderate, 3=severe, 4=very severe) and extent of involvement from 0 (no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease. The baseline was defined as the closest measurement taken prior to or at the time of first study drug administration date in 77242113PSO2001 study.

Percentage of participants who achieved PASI-75 score (greater than or equal to \[\>=\] 75% improvement from baseline in PASI) at Week 16 was reported. The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0=none, 1 = slight, 2 = moderate, 3 = severe and 4 = very severe) and extent of involvement from 0 (indicated no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date.

AUC(0-last) is defined as area under the plasma concentration versus time curve from time zero to time of the last measurable concentration of JNJ-77242113.

AUC(0-infinite) is defined as area under the plasma concentration versus time curve from time zero to infinite time of JNJ-77242113.

Cmax is defined as maximum observed plasma concentration of JNJ-77242113.

Tmax is defined as time to reach the maximum observed plasma concentration of JNJ-77242113.

T1/2 is defined as apparent elimination half-life associated with the terminal slope of the semilogarithmic drug concentration-time curve of JNJ-77242113.

CL/F is defined as apparent total systemic clearance after extravascular administration of JNJ-77242113.

Vz/F is defined as apparent volume based on terminal phase after extravascular administration of distribution of JNJ-77242113.

An AE is any untoward medical occurrence in a participant participating in a clinical study that does not necessarily have a causal relationship with the pharmaceutical/biological agent under study.

Plasma samples will be analyzed to determine concentrations of JNJ-77242113 using a validated, specific and sensitive method.